On 13/11/2015 8:11 AM, Ilgaz S wrote:
Hello everybody, I am new to R and I discovered something that suprise me
and I have a question about it.
Today I wanted to return a bit array which represents this:
if( arbitrary point above the line)
return TRUE
else
return FALSE
First I tought I would use for loop and access every element of the data.
Then I tend to use lapply function.
At the end, I accidently done that without using any if/else statement. (
or for loop ) Here is the code:
I can't read your code (you posted in HTML, don't do that), but it
sounds as though you have discovered vectorized operations. These are
central to good R programming, and are well described in the
Introduction to R manual.
Duncan Murdoch
data <- data.frame(x= c(1,2,3,1,1,1), y = c(1,2,3,4,6,7))fin_hyp <-
list(slope=2,constant=1)outputs <- data['y'] > fin_hyp['slope'] *
data['x'] +fin_hyp['constant']outputs
What is R doing here? It is using loop somewhere inside? Is this code
more efficient than other methods I mentioned?
Thank you, I.S.
[[alternative HTML version deleted]]
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